Locking device for pump handles



Dec. 25, '1922.`

H. E.VTUNNELL.

-LocK|Ns Ds-:vxcs Fon PUMP HmoLEs.

FILED APR 7. 1919 patented Bec. 26, 1922.

HARRY n. TUNNELL, or Nnw Yoan, N; Y.,

WED STATESPATENT QF maar ASSIGNOR 'IO .FIRE GUN' MANUFACTURNG COMPANY, INC., OF vNIEVV YORK, N. Y., A CORPORATION OF NEW YORK.

LOCKING DEVICE non "PU-Mr HANDLEs.

Application filed April 7',`

The object of my invention is to provide a simple construction Afor normally looking the pump handle in vits yinoperative position,

i f yet allowing its ready disengagement when which it is desired to operate the pump. Preferably, I so construct the appliance that a mere longitudinal movement of the handle inwardly will not only lock the handle against longitudinal movement, but will also operate a device to close the outlet through which the liquid is ejected during thev operation of the pump, while an outward movement of the handle, or of the locking device, will release the `pump piston for operation and at the same time free the said outlet. y

Without desiring to restrict myself to the speciiic construction shown, I` will `now descri-be a preferred embodiment of my invention with reference to the accompanying drawings, in which Fig. 1 vis a partial longitudinal section oi: a lire-extinguisher provided withniy improvement., lthe handle of the gunip being shown in thc locked position; Fig. 2 is a similar yView showing the locking device .in the released position; 3 is a section substantially 4on line 3 3 of llig. 1; Fig. 4 is a side elevation of the handle; 4and Fig. 5 is a cross section Aon line 5 5 of Fig. 1. A v f ln the drawings, I have-shown the improved locking device in connection with the Vcontainer havinga head 10 and a shell or body 10', said headbeing provided with an opening having a flange 10",` adjacent thereto, against which is seated a tubular,l casing' 11 engaging the pump barrel 12 is stationary in the container. The casing 11 also has a channelfll communieating with a pipe 13 through which the liquid or iluid is caused 'to travel by the 1919. Serial No. 288,184.

reciprocation of the pump piston. In the vouter portion of the casing l1 is contained a box or holder 14; for packing material 15,

l'the details-.of this packing or stufHng-box construction, with the channels- 11 and 14 for 'the inlet of air and return of liquid being described more fully and claimed in another application i'or Letters Patent filed by me inthe United States Patent @mee on January 18, 1919, Serial No. 271,830.

yThrough the said packing extends the piston trod 16'015 the pump,vsaid rod also passing through a gland li'threaded into the box le.j The projecting portion of the glandL 17 fits -into a tubular member 18 provided with ya ilange 18V seated on the outside oit the -ilange 10r and soldered or otherwise secured thereto. This member, which forms vpart vof the locking device, has an annular krecess 18 in whichare adapted to be seated the locking balls 19. These balls also engage sockets having vertical walls 20', that is to say, wallspzparallel to the path along which vthe piston rod-16 reciprocates, said sockets being formed on the inner surface of an outwardly-contracted member 20. rigid forintegral with 'the lower portion 21 oit fthewpump handle.` The'piston rod 16 is secured, as .byv a screw `connection 16', to a member22fwhich flares correspondingly to the member 20, said .member 22 being made with Aa shank or stem 22 riveted or 'otherwise secured to the outer handle portion 23.

and one 'of them as 21 is vuided for slidf `ing `movement inthe other.

At the other or lower end of the container l have shown a hea-d 10* suitablyv connected with an outlet casing 24 which has secured thereto anozzle 25 projecting to the outside ci the container and'provided with a passage 25 ythrough which the iuid is ejected. rflhc kpassage 25 is connected with. a chamber 25"` separated ,'byan annular wall from an annular cham'ber 25*y which is in permanent communication, through apertures 25, withr an annular chan'iber 2i,and through a port -llO 2l, with a delivery passage 26 through which the luid passes to said chamber 24C. rllie easing 2li's `also provided with a pertointed partition 24 and with a port 24h located on the same side of said partition as the pump barrel 12. On the other side of said partition is formed a chamber 24"" in which a valve member 27 is adapted to move vtoward and from the nozzle 25, said valve,`

its seat when the handle is pushed fully inward. The spring 29' also bears against a collar 30 on a sliding meiiiber'BO interposed between the valve member and the inner end of the piston rod 16, said sliding` member beine guided in tue iartition 2li-i"l and m54 j adapter. to be engaged, and forced toward the outlet nozzle, by the end of the piston `red 16 projecting beyond the piston 16.

The details of the valve mechanism at the iozzleare not claimed by me in this application, although they were likewise invented by me; it will be obvious that vthe result ot sealing the outlet by merely pi'ishiiig'the handle `fully inward, may be obtained with other outlet valve constructions than the one illustrated. l have not illustrated herein certain valves connected with the pipe 13, passage 26 andwith the port 24h, to secure a proper operation of the pump as the piston 16 reciprocates; these parts may be constructed in any suitable mannen for instance'as disclosed in my pending application above referred to.

When ther apparatus is not in usethe bulls 19 lie within therecess 18 ot the member 18, the latter being stationary relatively to `the pump barrel `l2. 'lhe outer portions ot these balls lie ropposite the vertical socket walls 20', the spring 23 pressing the members 21, 20 down into the locking position, and as Along as the part 20 is in this position. the balls 19 are unable to leave the recess 18". Thus, if with the parts in the position Fig. 1, an outward pull should be exerted on thel handle portion 23 alone, this would cause the flange 22, which is rigidly connected with said handle portion 23, to exert pressure upwardly or outwardly on the balls 19, but as the member 20 at this time prevents the balls from leaving the recess 18, the outer portion of the member 18 -(beyond the recess 18)\will form a stop lock the said balls together with the member L2 and the handle portion'23, and consequently also the piston rod 16 and piston 16, against longitudinal outward move- `known or approved manner.

)arts are in the position Figs. 1 and 5, thenient.. it the same time, pushing the parts inward to the position shown in Figs. 1 and also looks the valve member 27 in the sealing position, since the piston rod 16, which is locked as explained above, through its action on the sliding 'member' 30 and on the spring 29 presses the member 27 tightly against the two valve seats.

Villien'it lis desired to operatefthe pump, the user simply grasps the handle 21, 23, and in the act of so `doing necessarily brings the said two handle portions together by the pressure exerted by his lingers toward the thumb and the palm, thereby causing the portion 21 with the .attached member 2O to slide outwardly relatively to the handle portion 23 and attached member 22, 22', 22. rlhe vertical socket walls 20 are thus brought out of alinement with the centers ot the locking` balls 19, so that the latter are no longer restrained against Amovement away from the axis of the piston rod 16, the opening at the lower end oi? the member 2O liaring beyond saidA vertical walls, thereby aliording-rooni or play 'for such outward movement ot the balls 19. llt Athen the entire vhandle together with the piston rod 16 is pulled outwardly, the lla-nge 22 will cause the balls 19 to share this longitudinal movement, while the curved or inclined outer wall ot the recess 16-will force the said balls away from the piston rod, thus releasing thehandle from the locking action clthe balls. The handle,

vpiston rod 16. and piston 16 may thus be reciproeated freely to cause the fluid to be expelled through the nozzle in any well- Fig. 2 shows the position ol", the parts just asthe release `oi the locking balls 19 occurs.

W'hen the pump is no longer used, the

handle will be pushed in fully, the balls 19, which always remain inthe 'sockets 22, passr over the outer end-ot the stationary member 1S into 4registry with the recess or groove 1S. and ywhen the handle is released, the i springl 25S vwill throw the member 20 und the locking balls '19 into the locking position illustrated by llligs. vl and "l'llhen the operation; oit' the `pump begins, the valve meinbersiA is opened not only by the spring 28, but by the pressure `oli the liquid entering the chamber 2511 A. washer 31 helps to prevent leakage when the handle is pushed in fully.

il claim as my invention:

1. A pump comprising stationary meinber and a reciprocating` member including a handle having two portions slidable relatively in' the direction of the reciprocation,

and 'co-Operating locking elements connected respectively with said stationary member and with` one of said handle portions.

2. A pump comprising a stationary niember and a reciprocating member including a handle` having two portions one oi'f which is slidable relatively to the other in the Vdirection of the path of reciprocation, a`

spring tending to separate said handle portions, and co-operating locking elements connected with said stationary member and said movable. `handle portion'respectively, and brought to the releasing' and locking positions respectively by a longitudinal movement of the reciprocating member in conjunction with a relative sliding movement of the movable handle portion toward or from the other handle portion respectively.

3. A pump comprising a stationary member including a barrel, a reciprocating member including a piston arranged to move in said barrel, a piston rod secured toy said piston, a handle portion secured to said piston rod, another handle portion slidable lengthwise. on the piston rod, and locking mechanism controlled by the movement ot' the last-named handle portion relatively to the first-named handle portion.

4. A pump comprising a stationary member and a reciprocating member having two portions movable relatively in the direction of'said reciprocating movement, and a locking member adapted to co-operate with said stationary member and carried by one of said portions of the reciprocating member, said locking member being movable transversely relatively to both portions of the reciprocating member, the other portion of said reciprocating member projecting into the transverse path of the locking member and controlling the extent of its transverse movement. y

5. A pump comprising a stationary member having a recess, and a reciprocating member having two relatively-movable portions and a ball carried by one of them and adapted for locking engagement vwith Said stationary member at the recess thereof, the locking or release of said ball being controlled by the relative motion of the two portions of the reciprocating member.

6. A pump comprising a stationary member and a reciprocatingmember including a handle havingl two portions relatively slidable inthe direction oi reciprocation and in sliding engagement with one another, and locking elements connected re spectively with one of said portions and With the stationary member, and controlled by the relative movement of said portions. i

8. A pump comprising a stationary member having a recess, and a reciprocating member having two portions movable relatively in the direction of the reciprocating movement, a ball carried by one of said portions and movable thereon transversely into and out'of said recess, such transverse kmovement of the ball being controlled'by the. relative longitudinal movement of the two portions of 'the reciprocating member.

9. A pump comprising a stationary member having a recess and including a barrel, a reciprocating member :including a piston arranged to move in said barrel, a piston rod secured to said piston, a handle portion secured to said piston rod, a carrier likewise secured to said piston rod and provided with a seat, a'ball on said seat, adapted for locking engagement with the stationary member at the recess thereof, another handle portion mounted to slide lengthwise on the piston rod and in sliding engagement with the first-named handle portion, said sliding handle portion being provided with a restraining surfacewhich may be retractedto allow the ball tomoveout of locking engagement with the stationary member, and a spring tending to throw said sliding handle portion into a position in which its restrainin surface will block the movement of said all away from the axis of the piston rod.

lO.- A pump comprising a stationary member and a reciprocating member, the latter including a handle having two similary portions each projecting to both sides of the axis of said reciprocating member, said handle portions being relatively movable on both sides of said axis to bring them to- Ward orfrom each other, and a locking device co-operating with said stationary member and controlled by the relative movement of the two handle portions.

In testimony whereof I@ have signed this speciiication.

HARRY E. TUNNELL. 

